/**
 * ﻿Copyright (C) 2010 - 2016 52°North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * If the program is linked with libraries which are licensed under one of
 * the following licenses, the combination of the program with the linked
 * library is not considered a "derivative work" of the program:
 *
 *       • Apache License, version 2.0
 *       • Apache Software License, version 1.0
 *       • GNU Lesser General Public License, version 3
 *       • Mozilla Public License, versions 1.0, 1.1 and 2.0
 *       • Common Development and Distribution License (CDDL), version 1.0
 *
 * Therefore the distribution of the program linked with libraries licensed
 * under the aforementioned licenses, is permitted by the copyright holders
 * if the distribution is compliant with both the GNU General Public
 * License version 2 and the aforementioned licenses.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 */
package org.n52.wps.server.r.util;

import java.io.IOException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Starting RServe via command line on different OS.
 * 
 * For documentation see http://www.rforge.net/Rserve/doc.html
 * 
 * For information about RServe on Windows see http://rforge.net/Rserve/rserve-win.html
 * 
 * @author Daniel
 * 
 */
public class RStarter {

    private static Logger log = LoggerFactory.getLogger(RStarter.class);

    private static void startRServeOnLinux() throws InterruptedException, IOException {
        String rserveStartCMD = "R CMD Rserve --vanilla --slave";
        Runtime.getRuntime().exec(rserveStartCMD).waitFor();
    }

    private static void startRServeOnWindows() throws IOException {
        String rserveStartCMD = "cmd /c start R -e library(Rserve);Rserve() --vanilla --slave";
        Runtime.getRuntime().exec(rserveStartCMD);
    }

    public void startR() throws InterruptedException, IOException {
        log.debug("Starting R locally...");

        if (System.getProperty("os.name").toLowerCase().indexOf("linux") > -1) {
            startRServeOnLinux();
        }
        else if (System.getProperty("os.name").toLowerCase().indexOf("windows") > -1) {
            startRServeOnWindows();
        }

        log.info("Started R.");
    }

}
